METHOD AND APPARATUS FOR STRENGTHENING BY MEANS OF KILOHERTZ LOW-ENERGY LASER SCANNING SHOCK

WIPO Patent Application WO/2021/052065

A1

Disclosed are a method and apparatus for strengthening by means of kilohertz low-energy laser scanning shock. The method comprises the steps of: pretreatment of a workpiece, coating with an absorption and protection layer, application of a confinement layer, scanning laser shock treatment, and post-treatment of the workpiece. The apparatus comprises an optical fiber laser device (1), a process control system (2), an industrial personal computer (3), a processor (4), a sound wave acquisition device (5), a motion platform (6), and a photosensitive element (10). A high-repetition-frequency and low-energy laser is output by means of the optical fiber laser device, so that a design for a mechanical system is made very simple, the comprehensive photoelectric efficiency reaches 20% or above, the power consumption during working is significantly reduced, and operation cost is reduced. A scanning shock treatment on an area to be strengthened is performed by means of a high-speed shot flow simulating mechanical shot blasting, so as to improve the machining efficiency and solve the problem of the great difficulty of optimizing the residual stress field after strengthening. A small-light-spot and low-energy laser is used for scanning-type machining strengthening, so as to achieve wider adaptability.

ZHOU LIUCHENG (CN)
LI YINGHONG (CN)
PAN XINLEI (CN)
TIAN ZENG (CN)
HE WEIFENG (CN)
FENG XIAOTAI (CN)
SHI XIAOSONG (CN)

PCT/CN2020/108527

March 25, 2021

August 11, 2020

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AIR FORCE ENGINEERING UNIV (CN)

C21D10/00; C21D1/09

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CN110205478A	2019-09-06
EP1911855B1	2014-06-18

BEIJING KZ LAW FIRM (CN)

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